Copper alloy, copper alloy ingot, solid solution material of copper alloy, and copper alloy trolley wire, method of manufacturing copper alloy trolley wire

Abstract

A copper alloy has a composition including 0.05 mass % or more and 0.70 mass % or less of Co; 0.02 mass % or more and 0.20 mass % or less of P; 0.005 mass % or more and 0.70 mass % or less of Sn, one or more of B, Cr, and Zr; and furthermore, a Cu balance containing inevitable impurities, wherein X, Y, and Z satisfy the following Expression (1): 1≤(X/5)+(Y/50)+(Z/100) and Expression (2): X+Y+Z≤1,000, in case where an amount of B is represented by X (massppm), an amount of Cr is represented by Y (massppm), and an amount of Zr is represented by Z (massppm).

Description

TECHNICAL FIELD[0001]The present invention relates to a precipitation hardening-type copper alloy containing Co, P, and Sn which is used for, for example, a wire in a vehicle or a device, a trolley wire, a wire for a robot, a wire for an aircraft, and the like, a copper alloy ingot, a solid solution material of copper alloy, and a copper alloy trolley wire, a method of manufacturing a copper alloy trolley wire.[0002]Priority is claimed on Japanese Patent Application No. 2016-124661, filed Jun. 23, 2016, and Japanese Patent Application No. 2017-115427, filed Jun. 12, 2017, the contents of which are incorporated herein by reference.BACKGROUND ART[0003]In the related art, for example, as described in Patent Document 1 and 2, as an electrical wire for wires in a vehicle or a device, an electrical wire obtained by coating an electrical wire conductor, which is formed by twisting a plurality of copper wires together, with an insulating coat is provided. In addition, for efficient wiring o...

AI Technical Summary

Benefits of technology

[0054]According to the present invention, it becomes possible to provide a copper alloy containing Co, P, and Sn which is capable of suppressing the coarsening of the crystal grain diameters even in a case in which a heat solution treatment is carried out, is excellent in terms of workability and high-temperature elongation, and is excellent in terms of strength and electrical conductivity, a copper alloy ingot, a solid solution material of copper alloy, and a copper alloy trolley wire which is excellent in terms of wear characteristics and fatigue characteristics and a method of manufacturing a copper alloy trolley wire.

Problems solved by technology

In recent years, the travelling speed of electric railroad vehicles has been increasing; however, when, in a high-speed railway such as Shinkansen, the travelling speed of an electric railroad vehicle becomes faster than the propagation speed of a wave generated in an overhead wire such as a trolley wire, the contact between the power collection device such as the pantograph and the trolley wire becomes unstable and thus there is a concern that it may become impossible to stably feed power.

However, in a case in which a copper alloy is manufactured by carrying out hot extrusion after the production of an ingot having a large sectional area, the length of the copper alloy to be obtained is limited by the size of the ingot, and it has not been possible to obtain a long copper alloy wire (copper alloy trolley wire).

In addition, there has been another problem of poor production efficiency.

Therefore, in order to ensure the strength, it is necessary to manufacture a copper alloy wire using the manufacturing method including the hot extrusion step, and it has not been possible to efficiently produce high-strength copper.

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